Affiliation:
1. School of Chemistry and Chemical Engineering Anhui Province Key Laboratory of Value‐Added Catalytic Conversion and Reaction Engineering Hefei University of Technology Hefei 230009 China
2. School of Mathematics and Physics Science and Engineering Hebei University of Engineering Hebei Computational Optical Imaging and Photoelectric Detection Technology Innovation Center Hebei International Joint Research Center for Computational Optical Imaging and Intelligent Sensing Handan 056038 China
Abstract
AbstractAntimony selenosulfide (Sb2(S,Se)3) solar cells are critically restrained by the Sb2(S,Se)3/charge transport layer interface with scarce carriers transfer ability and high density of deep‐level defect‐induced traps, which are prone to spark the nonradiative recombination and capture the benign photogenerated carriers. Herein, utilizing the intermolecular noncovalent interactions strategy in molecular stereoscopic structural engineering, two dopant‐free hole transport materials (HTMs) are constructed, coded as T‐BDT and F‐BDT, with synergistic hole selectivity and interfacial healing ability. The theoretical simulation and experimental results decipher that the F‐BDT possesses the more favorable planarized conformation, charge delocalization/coupling and molecular stacking pattern, which endow it with the salient hole selection, robust interface passivation and appropriate energy level alignment. Consequently, the Sb2(S,Se)3 solar cell with F‐BDT as dopant‐free HTM realize an outstanding power conversion efficiency of 9.13%, hitting the record high for Sb2(S,Se)3 devices under dopant‐free conditions.
Funder
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
Natural Science Foundation of Anhui Province
Cited by
1 articles.
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